was playing around on the dsp and tried out the 87 tune and had bad luck, truck stalled rough idle surging ect, put in half tank of 91 and it partially solved the problem. it threw the p0300 code momentarely but didnt stay on. the truck still doesnt feel right, I can hear a stutter in the exhaust note at steady 1500-2000 rpm. the tach does not fluctuate but it just doesnt seem right. now when i turn the key to on the cel flashes 10 times but i scanned the cels with both my scanner and the dsp both come up as no codes.:4-dontknow: HELP!!!